Summary

Summary of Gallery and Slideshow plugins We only looked at two plugins in any detail. All the others were rejected for some reason or another.

Plugin name and description Plugin links Version, total downloads, last update, tested
WordPress Gallery Plugin – NextGEN Gallery
The most popular WordPress gallery plugin and one of the most popular plugins of all time with over 23 million downloads.
nextgen-gallery
home
3.1.1
23686518
2018-11-29 7:03pm GMT
5.0.0
Portfolio Slideshow
Add a clean, responsive JavaScript slideshow to your site.
portfolio-slideshow
home
1.12.1
409992
2018-04-21 4:28am GMT
4.9.8

The NextGEN gallery plugin appears to have the most Add-ons.